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【单选题】
若要求三相负载中各相电压均为电源线电压,则负载应接成( )A.
所列选项都对
B.
星形无中线
C.
三角形联接
D.
星形有中线
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举一反三
【简答题】Real controllable switches don't have these ideal characteristics and hence will _________ power when they are used in the numerous applications already mentioned.
【单选题】Which of the following best describes a controllable cost?
A.
A cost which can be easily forecast and is therefore readily controllable using budgetary control techniques
B.
A cost which can be specifically identified with a particular cost object
C.
A cost which is easily controlled because it is not affected by fluctuations in the level of activity
D.
A cost which can be influenced by its budget holder
【简答题】设堆栈指针 SP的初值为2300H,(AX)=5000H,(BX)=4200H。执行指令PUSH AX后,(SP)=?,再执行指令PUSH BX及POP AX之后,(SP)=? (AX)=? (BX)=?
【单选题】Which of the following best describes a controllable cost?
A.
A cost which can be easily forecast and is therefore readily controllable using budgetary control technique.
B.
A cost which can be separately identified with a particular cost object
C.
A cost which is easily controlled because it is not affected by fluctuations in the level of activity
D.
A cost which can be influenced by its budget holder.
【简答题】设堆栈指针SP=2300H,AX=0ABCDH,BX=1234H。执行指令PUSH AX后,SP=_______。再执行指令PUSH BX及POP AX后,SP=_______,AX=_______,BX=________。
【简答题】设堆栈指针SP的初值为2300H,AX=50ABH,BX=1234H。执行指令PUSH AX后,SP=(),再执行指令PUSH BX 及 POP AX之后,SP=(),AX=(),BX=()。
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